Testing device for heat-conducting property of stuffing sand

Abstract

The utility model discloses a device for testing the heat-conducting property of stuffing sand, and solves the problems that the existing heat-conducting property testing device is open, has operation risks and has potential safety hazards. The device comprises a high-temperature furnace, an opening is formed below the high-temperature furnace, a nozzle brick cup is arranged in the opening, and a first high-temperature thermocouple sensor is arranged in the opening; a closing plate capable of being opened in a swinging mode is arranged below the high-temperature furnace, and the opening can be closed or opened by swinging of the closing plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to material testing technical field especially relates to a test device of drainage sand heat conduction performance. BACKGROUND

[0002] Ensuring the smooth operation of continuous casting is the primary task of each steel plant production. The most important link in the continuous casting process is the ladle pouring, and whether the ladle can self-open determines the good or bad of the ladle pouring effect. The performance of the drainage sand is the key factor to determine whether the ladle can self-open smoothly.

[0003] The drainage sand plays a role in opening and draining in the casting production. At the moment of opening, the lower layer of unsintered drainage sand flows out smoothly through the hydraulic device opening the baffle below the ladle downcomer, and the molten steel breaks through the sintered layer of the drainage sand by its own weight, flows into the tundish through the long nozzle, which is a complete and smooth pouring process. In this process, the purpose of smooth pouring is achieved by controlling the appropriate sintered layer of the drainage sand, and the heat conduction performance of the drainage sand determines the strength of the sintering.

[0004] The drainage sand is filled in the downcomer part at the bottom of the ladle, and after filling, the upper part of the drainage sand is directly in contact with the high-temperature molten steel, and the lower part is cold air. The heat conduction performance of the drainage sand will affect the temperature field inside the nozzle, and thus affect the sintering strength of the drainage sand, so the research on the heat conduction performance of the drainage sand is very important. At present, there is little research on the heat conduction performance of the drainage sand, and the only research cannot reflect the use of the drainage sand under high-temperature conditions.

[0005] The test temperature range of the material thermal conductivity test device on the market is very low, and it is rare to reach above 1400℃, while the use environment temperature of the drainage sand is above 1600℃, which leads to the fact that the test results obtained by using the common test device cannot well feedback the performance of the drainage sand under the real use conditions. In addition, the sample amount is small during testing, and the drainage sand has segregation, so the test results do not have reproducibility and cannot meet the research of the drainage sand. The high-temperature material thermal conductivity coefficient measuring device, such as Chinese patent CN2010101257880, can only measure high-temperature materials below 1400℃, which is far from the on-site use temperature condition of the drainage sand, and the measurement result is not representative, and cannot well reflect the heat conduction performance of the drainage sand. The conventional thermal conductivity test device, such as Chinese patent CN2021230803461, has an open test environment, which has operation risks and certain safety hazards. UTILITY MODEL CONTENTS

[0006] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a test device for the heat conduction performance of the drainage sand, which effectively solves the problem that the thermal conductivity test device is open, has operation risks and has safety hazards.

[0007] To achieve the above object, the technical scheme of the utility model is: a testing device for drainage sand heat conduction performance, comprising a high temperature furnace, an opening is arranged below the high temperature furnace, a water gap seat brick is arranged in the opening, a first high temperature thermocouple sensor is arranged in the opening;

[0008] An oscillatable closing plate is arranged below the high temperature furnace, and the oscillation of the closing plate can block or open the opening.

[0009] Preferably, the opening is a recessed step structure.

[0010] Preferably, a front door is hinged to the front side of the high temperature furnace.

[0011] Preferably, a second high temperature thermocouple sensor is further arranged in the high temperature furnace.

[0012] Preferably, a heating device is further arranged in the high temperature furnace.

[0013] Preferably, a front and rear horizontal sliding block is arranged below the high temperature furnace, a connecting rod is hinged below the sliding block, and the other end of the connecting rod is hingedly fixed with the closing plate.

[0014] Preferably, a guide rail is fixed to the lower end of the high temperature furnace, and the sliding block horizontally slides along the guide rail.

[0015] A support frame is fixed to one side of the guide rail, an insertion rod is slidably arranged on the support frame, a plurality of through holes are arranged on the sliding block, and the insertion rod inserted into the through hole constitutes a structure for fixing the sliding block.

[0016] Preferably, a plug is fixed to the insertion rod, and the plug is in contact with the guide rail to constitute a structure for limiting the insertion rod.

[0017] Preferably, a spring is sleeved on the outer circumference of the insertion rod, one end of the spring is fixedly connected with the plug, and the other end of the spring is fixedly connected with the support frame, and the spring is always pushed into the through hole.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1) The high temperature furnace can simulate the field use environment of the drainage sand, meet the temperature requirements of actual production, test the heat conduction performance of the drainage sand, obtain representative heat conduction performance data of the drainage sand, and have innovation; and provide technical support and scientific judgment for actual field production of the ladle drainage sand pouring;

[0020] 2), test in high temperature environment, the temperature of test is higher, temperature range is very big, can cover 10-1700 DEG C, special water gap seat brick inner diameter size range is phi 30-120mm, test result can satisfy direct reaction drainage sand in actual different ladle water gap use environment and the heat conduction performance under the tapping temperature, provide technical data basis for the actual use and development of drainage sand field;

[0021] 3), compared with in the existing material heat conduction performance test device, only a small amount of drainage sand can be used for test, the present application directly fills and places drainage sand in the furnace for test, and the quantity of filling is large, so that the test result has reproducibility, and the test data is more convincing;

[0022] 4), test in closed high temperature furnace, change the heat conduction performance test in the past in open environment, improve the safety of test process. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the whole structure schematic diagram of the utility model;

[0024] Figure 2 It is the structure schematic diagram of the utility model after being partially cut open;

[0025] Figure 3 It is the structure schematic diagram of the utility model of shaft side;

[0026] Figure 4 It is the structure schematic diagram of the utility model of closing plate swing opening in implementation;

[0027] Figure 5 It is Figure 4 The structure schematic diagram of A part in the utility model;

[0028] Figure 6 It is the structure schematic diagram of water gap seat brick;

[0029] In the drawing, 1 is high temperature furnace, 2 is water gap seat brick, 3 is first high temperature thermocouple sensor, 4 is closing plate, 5 is front door, 6 is second high temperature thermocouple sensor, 7 is heating device, 8 is sliding block, 9 is guide rail, 10 is connecting rod, 11 is support frame, 12 is insertion rod, 13 is plug, 14 is spring. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples.It should be understood that the specific examples described herein are only intended to explain the utility model and are not intended to limit the utility model, that is, the described examples are only a part of the examples of the utility model, but not all examples.The components of the utility model examples described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the detailed description of the embodiments of the utility model provided in the drawings below is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model.Based on the embodiments of the utility model, all other examples obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0032] Please refer to Figures 1-6 A testing device for the heat conduction performance of drainage sand, comprising a high-temperature furnace 1, an opening is arranged below the high-temperature furnace 1, a water nozzle base brick 2 is arranged inside the opening, and a first high-temperature thermocouple sensor 3 is arranged in the opening.

[0033] The water nozzle base brick 2 is specially made and has multiple specifications to be selected according to requirements; preferably, the inner diameter size range of the water nozzle base brick 2 is φ30-120mm.

[0034] A closable plate 4 that can swing to open is arranged below the high-temperature furnace 1, and the closable plate 4 can be swung to block or open the opening.

[0035] The testing environment of the device is in the high-temperature furnace 1, so there is no safety hazard in the testing process; the opening is arranged below the high-temperature furnace 1 to simulate the shape of the water nozzle base brick 2 to simulate the real use environment of the drainage sand, so that the testing result can fully reflect the heat conduction performance of the drainage sand.The opening is in the form of a recessed step, which facilitates the laying of the water nozzle base brick 2 on the inner wall of the opening to achieve the supporting and solidifying effect.In order to make the testing data results reproducible, the drainage sand is directly added to the water nozzle base brick 2 below the high-temperature furnace 1, and more drainage sand samples are used each time to avoid the segregation of the drainage sand, so that the testing structure is representative and the data re-effect is good.

[0036] As Figure 2 shown, it is a partially cutaway state diagram; it can be seen that the lower end of the water nozzle base brick 2 is placed on the step of the opening; the water nozzle base brick 2 is assembled by multiple pieces to form a ring body with a suitable inner diameter (several pieces are removed in the figure, and it is a complete ring body in actual use).

[0037] Further, as Figure 6The inner side of the water nozzle base brick 2 is provided with a lower protruding edge; the outer ring side of the lower protruding edge is matched with the inner ring side of the lower step of the opening; meanwhile, the lower end of the lower protruding edge is flush with the outer bottom surface of the high-temperature furnace 1 and is in contact with the upper end of the closing plate 4, forming a covering of the drainage sand and a straight-through closing plate 4; and the inner ring inner diameter of the water nozzle base brick 2 is uniform, and the step inner diameter of the opening does not affect.

[0038] The front side of the high-temperature furnace 1 is hinged with a front door 5.

[0039] The high-temperature furnace 1 is further provided with a second high-temperature thermocouple sensor 6.

[0040] The high-temperature furnace 1 is further provided with a heating device 7.

[0041] The heating device 7 is arranged inside the furnace body, close to the two sides of the furnace wall, and the second high-temperature thermocouple sensor 6 is arranged on the rear furnace wall.

[0042] It should be noted that, in order to ensure sufficient temperature, the heating device 7 should be provided with multiple.

[0043] In use, first, open the front door 5, replace the water nozzle base brick 2 with the required inner diameter size, fix the closing plate 4 below the high-temperature furnace 1, and then fill the drainage sand above the water nozzle base brick 2, so that the drainage sand completely fills the water nozzle base brick 2 and has a steamed bun shape, and then set the temperature rising program, and the temperature rising speed is controlled to be 10-20 ℃ / min. Different test temperatures can be set, and when the temperature reaches the specified thermal conductivity test point, the second high-temperature thermocouple sensor 6 in the furnace and the first high-temperature thermocouple sensor 3 at the opening will continuously feedback the temperature at that time; then, the results are calculated according to the specified program, and the results changing with time can reflect the thermal conductivity of the drainage sand.

[0044] As one of the embodiments, screws can be arranged on the closing plate 4, the closing plate 4 is fixed below the furnace body through the screws, the screws are loosened, the closing plate 4 is opened, the furnace bottom opening is opened, and the unsintered drainage sand can freely fall.

[0045] As another embodiment, the high-temperature furnace 1 is provided below with a front-rear horizontal sliding sliding block 8, the sliding block 8 is hinged below with a connecting rod 10, and the other end of the connecting rod 10 is hinged and fixed with the closing plate 4.

[0046] Through the horizontal sliding of the sliding block 8, the closing plate 4 is swung under the action of the connecting rod 10, so as to complete the closing and opening of the opening.

[0047] The high-temperature furnace 1 is fixed below with a guide rail 9, and the sliding block 8 slides horizontally along the guide rail 9;

[0048] The support frame 11 is fixed on one side of the guide rail 9, and the insertion rod 12 is slidably arranged on the support frame 11.

[0049] In the device, the guide rail 9 is a hollow rectangular block, and the sliding block 8 slides along the guide rail 9 to limit the sliding block 8; the through hole is provided with two, one is corresponding to the closing of the opening of the closing plate 4, and the other is corresponding to the opening of the opening of the closing plate 4; when the insertion rod 12 is inserted into different through holes, the sliding block 8 is fixed.

[0050] The plug 13 is fixed on the insertion rod 12, and the plug 13 is in contact with the guide rail 9 to limit the insertion rod 12.

[0051] The spring 14 is sleeved on the outer circumference of the insertion rod 12, one end of the spring 14 is fixedly connected with the plug 13, and the other end of the spring 14 is fixedly connected with the support frame 11, so that the spring 14 always pushes the insertion rod 12 to insert into the through hole.

[0052] The position of the insertion rod 12 is limited by the plug 13; the stability of the insertion rod 12 after being inserted into the through hole is ensured by the spring 14; and the closing plate 4 is in a stable state without external force intervention.

[0053] In addition, two indicator plates (as shown in the sliding block 8) Figure 5 The convex blocks on the sliding block 8); as Figure 5 At this time, one convex block is located inside the guide rail 9, and the other convex block is flush with the left opening of the guide rail 9 (the sliding block 8 extends out of the opening); when one convex block is flush with the opening of the guide rail 9, the insertion rod 12 corresponds to one of the through holes; thereby increasing the convenience of operation.

[0054] The device is used for testing the heat conduction performance of the drainage sand, and is used for testing the heat conduction performance of the drainage sand in the high-temperature furnace 1 simulating the actual production environment of the ladle nozzle. The test is carried out under the high-temperature condition of the actual production liquid steel temperature environment, so that the test data is more representative, reproducible, and the safety performance is higher. This is an ability that the existing drainage sand heat conduction performance test equipment does not have.

[0055] The utility model discloses a can simulate the drainage sand field use environment in high temperature furnace, satisfy the heat conduction performance test of drainage sand under the temperature requirement condition of actual production, can obtain the representative drainage sand heat conduction performance data, with innovation, provide technical support and scientific judgment for actual field production ladle drainage sand opening casting, carry out testing in high temperature environment, the temperature of testing is higher, and the temperature range is very big, can cover 10-1700 DEG C. The specially-made nozzle seat brick inner diameter size range is phi 30-120mm, and the testing result can satisfy the heat conduction performance of directly reacting drainage sand in actual different ladle nozzle use environment and tapping temperature, and provide technical data basis for the actual use and development of drainage sand. Compared with in the heat conduction performance testing device of existing material, only a small amount of drainage sand can be used for testing, and the application directly fills and places the drainage sand in the furnace for testing, and the quantity of filling is large, so that the testing result has reproducibility, and the testing data is more convincing. Carry out testing in the closed high temperature furnace, change the heat conduction performance test in the open environment in the past, and improve the safety of the testing process.

[0056] It should be noted that the relational terms, such as first and second, and the like, are used solely to distinguish one from another entity or action, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. In the description of the present application, unless otherwise specifically stated and limited, the terms "mounting", "connected", "connecting" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected, can be mechanically connected, or can be electrically connected, can be directly connected, or indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] In the description of the present application, it should be noted that, unless otherwise specifically stated and limited, the term "provided with" that can appear should be understood broadly, for example, the object of "provided with" can be part of the body, or can be arranged separately from the body and connected to the body, and the connection can be detachable connection, or can be non-detachable connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A device for testing the thermal conductivity of a proppant, comprising: Including high temperature furnace (1), high temperature furnace (1) below is equipped with an opening, the opening is provided with a water gap seat brick (2), the opening is provided with a first high temperature thermocouple sensor (3); The high temperature furnace (1) below is provided with a swingable closing plate (4), the closing plate (4) swings and closes or opens the opening.

2. The testing device for testing the thermal conductivity of a proppant according to claim 1, wherein, The opening is a recessed step structure.

3. The testing device of claim 1, wherein the sand is a thermal conductivity testing sand. The high temperature furnace (1) is hinged with a front door (5) on the front side.

4. The testing device of claim 1, wherein the sand is a proppant sand. The high temperature furnace (1) is further provided with a second high temperature thermocouple sensor (6).

5. The testing device of claim 1, wherein, The high temperature furnace (1) is further provided with a heating device (7).

6. The testing device of claim 1, wherein, The high temperature furnace (1) below is provided with a front and rear horizontal sliding sliding block (8), the sliding block (8) below is hinged with a connecting rod (10), the other end of the connecting rod (10) is hinged with the closing plate (4).

7. The testing device for the thermal conductivity of a proppant according to claim 6, wherein, The high temperature furnace (1) is fixed with a guide rail (9) at the lower end, and the sliding block (8) slides horizontally along the guide rail (9). The guide rail (9) is fixed with a support frame (11) on one side, and an insertion rod (12) is slidably arranged on the support frame (11), a plurality of through holes are arranged on the sliding block (8), and the insertion rod (12) is inserted into the through hole to form a structure for fixing the sliding block (8).

8. The testing device for testing the thermal conductivity of a proppant according to claim 7, wherein, The insertion rod (12) is fixed with a plug (13), and the plug (13) is in contact with the guide rail (9) to form a structure for limiting the insertion rod (12).

9. The testing device of claim 7, wherein the sand is a mixture of 50% of silica sand and 50% of glass beads. The outer circumference of the insertion rod (12) is sleeved with a spring (14), one end of the spring (14) is fixedly connected with the plug (13), the other end of the spring (14) is fixedly connected with the support frame (11), and the spring (14) is always pushed into the through hole of the insertion rod (12).

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